And he went above and beyond with a thunderous dunk that brought down the house and launched a conversation about Costello's hometown -- at least sort of.

"Costello is a PARADE all-American who won the Mr. Basketball Award here in the state," ESPN announcer Mike Tirico said. "(He's from) Bay City, right near Flint and Saginaw ... an area that has been very, very fruitful for Michigan State. Remember the Flintstones leading Michigan State to that title."

To which ESPN analyst Dan Dakich replied: "Bay City, who gave us that great 70s rock band the Bay City Rollers."

Costello's dunk came with 2:50 left in the game on an offensive rebound. Michigan immediately called a timeout, giving the 6-foot-9 post player an opportunity to celebrate his big moment with teammates.

Cameras followed Costello to the bench, where his grin grew larger as teammates swarmed him.

After struggling to find minutes in his debut season with the Spartans, Costello delivered one of his best performances in the first-place showdown. He tallied eight points, hitting all three of his field goal attempts and both of his free-throw attempts, and added six rebounds.